Accuracy of 3-dimensional surgical guide for endodontic microsurgery with a new design concept: A cadaver study.

Aim: Despite the high success rate of endodontic microsurgery (EMS), it is difficult to suggest EMS as a general treatment option considering the difficulty of the procedure. A surgical guide has been proposed to overcome this problem. This study aimed to evaluate the stability of the surgical guide of a new design concept, as well as the accuracy of root resection, and to introduce the manufacturing method of the newly designed surgical guide.

Anti-cariogenic effect of experimental resin cement containing ursolic acid using dental microcosm biofilm.

Objective: This study aimed to assess the anticariogenic effects of resin cement containing varying ursolic acid (UA) concentrations and to determine the optimal UA concentrations in the microcosm biofilm model.

Materials And Methods: Experimental resin cements with UA concentrations of 0, 0.1, 0.

Fine particulate matter induces osteoclast-mediated bone loss in mice.

Fine particulate matter (FPM) is a major component of air pollution and has emerged as a significant global health concern owing to its adverse health effects. Previous studies have investigated the correlation between bone health and FPM through cohort or review studies. However, the effects of FPM exposure on bone health are poorly understood.

Laryngospasm following orthognathic surgery: an unusual case report.

This study discusses laryngospasm following orthognathic surgery and requiring emergency intubation, followed by systemic complications due to a hypoxic event. A 34-year-old male patient underwent orthognathic surgery due to facial asymmetry. When emerging from general anesthesia, blood pressure elevated suddenly, and severe agitation occurred.

Anatomical consideration and techniques in thread nose augmentation with mesh scaffold implant.

Introduction: Non-surgical rhinoplasty has evolved with the introduction of volumizing threads, which offer a less invasive alternative to traditional methods by enhancing nasal contours while minimizing filler use. This technique is gaining popularity, particularly in Southeast Asia, due to its shorter recovery time, reduced risk profile, and ability to prevent the 'Avatar nose' effect. However, there is limited anatomical guidance available for its application, especially in the Asian population.

Decomposition and Changes in In Vivo Post-HA Filler Injection: A Review.

Background: Hyaluronic acid (HA) fillers are widely used in aesthetic medicine, but their in vivo behavior and long-term effects are not fully understood.

Aims: To review the decomposition and changes occurring in the body following HA filler injections, focusing on crosslinking agents, degradation processes, and tissue responses.

Methods: This review analyzed oxidative and enzymatic degradation processes of HA fillers, evaluated the impact of 1,4-Butanediol Diglycidyl Ether (BDDE) crosslinking, and examined histological changes post-injection.

Efficacy of Subdermal Poly-d,l-Lactic Acid Injections for the Treatment of Melasma.

Background: Melasma is a chronic, recurrent skin disorder with limited long-term treatment success using conventional therapies like hydroquinone and laser treatments, which primarily target epidermal components while leaving dermal aspects untreated.

Objective: To evaluate the efficacy and safety of poly-d,l lactic acid (PDLLA) subdermal injections for treating moderate melasma.

Methods: Three female patients (age range: 45-59 years) with Fitzpatrick skin types III and IV received three PDLLA injection sessions at 3-week intervals.

Viscoelastic and antimicrobial dental care bioplastic with recyclable life cycle.

Medical plastic-appliance-based healthcare services, especially in dentistry, generate tremendous amounts of plastic waste. Given the physiological features of our mouth, it is desirable to substitute dental care plastics with viscoelastic and antimicrobial bioplastics. Herein, we develop a medical-grade and sustainable bioplastic that is viscoelastic enough to align the tooth positions, resists microbial contamination, and exhibits recyclable life cycles.

Treatment with Hyaluronic Acid Filler into Calcaneal Fat Pad for Height Augmentation.

The heel fat pad plays a crucial role in shock absorption during walking, yet clinical strategies to augment its thickness for height enhancement remain underexplored. This case report presents the novel use of cross-linked hyaluronic acid (HA) injections into the calcaneal fat pad as a method for height augmentation. A 37-year-old male, with a height of 162.

Three-dimensional Analysis of Skeletal Stability in Cleft Lip and Palate Patients Undergoing Bimaxillary Surgery With Le Fort I Osteotomy and Intraoral Vertical Ramus Osteotomy.

Orthognathic surgery in patients with lip and palate clefts is challenging owing to scar tissue from primary repairs and severe deformities. In this study, we evaluated the stability of Le Fort I osteotomy with intraoral vertical ramus osteotomy (IVRO) in patients with cleft lip and palate using 3-dimensional (3D) analysis. This retrospective study comprised 14 cleft lip and palate patients (3 females, 11 males; the average age at surgery: 23.

A comparison of the mechanical properties of 3D-printed, milled, and conventional denture base resin materials.

This study investigated the mechanical properties of three denture base resin materials produced by three-dimensional (3D) printing (Group P), computer-aided design/computer-aided manufacturing milling (Group M), and conventional (Group C) methods. Three-point flexural tests were performed before and after thermocycling treatment to evaluate the mechanical properties. Additionally, nanoindentation and dynamic mechanical analysis (DMA) were used to analyze the behavior of the materials.

Ocular and Periocular Tattoo Adverse Effects: A Review.

Background: Ocular and periocular tattoos, involving ink application to the eyeball or surrounding skin, have gained popularity as forms of self-expression. However, this trend raises significant concerns about potential complications that can adversely affect ocular health and esthetics. Awareness of these risks is crucial for both patients and practitioners.

Manufacturing Process of Hyaluronic Acid Dermal Fillers.

Hyaluronic acid (HA) fillers are extensively utilized in aesthetic medicine due to their biocompatibility, reversibility, and effectiveness in enhancing skin hydration, volume, and overall appearance. These fillers are predominantly produced through microbial fermentation, followed by a critical cross-linking process that enhances their longevity by resisting enzymatic degradation. This review provides a thorough examination of the manufacturing processes that differentiate HA fillers, with particular attention to the distinctions between biphasic and monophasic variants.

Intramuscular neural distribution of the vastus medialis for botulinum neurotoxin injection: application to spasticity.

Purpose: A comprehensive understanding of neural distribution within the vastus medialis is crucial for the effective administration of botulinum neurotoxin injections to manage spasticity. The aim of this study was to develop an anatomically informed approach to guide the administration of botulinum neurotoxin injections into the vastus medialis muscle.

Methods: Using a modified Sihler's method, we examined the vastus medialis muscles (20 specimens) to delineate the distribution of nerves relative to a transverse line extending from the anterior superior iliac spine to the base of patella.

Factors affecting unusual postoperative vertical downward movement of mandible after surgery-first approach using intraoral vertical ramus osteotomy.

Background: In very rare cases, patients who have undergone surgery-first approach with intraoral vertical ramus osteotomy (IVRO) exhibit unusual downward movements of mandible even up to 1-year post surgery, which makes it difficult for orthodontists to stabilize the occlusion during the postoperative orthodontic period. The aim of this study was to identify factors affecting the unusual downward movement of the mandible 1-year after the surgery-first approach using IVRO, while focusing on cephalometric values.

Methods: This retrospective cohort study sample was divided into two groups based on the amount of vertical movement of the B-point 1-year post surgery (Group S, predictable upward movement; Group U, unpredictable downward movement greater than 2 mm).